How high are you safely able to rev these 3 cyl motors without doing any damage?
As you may have seen, i have the G10a and am interested in knowing how high i can safely rev it?
cheers,
Anarki!
Safe rev range
...so run decent synthetic oils and new filters every 5000km! 
And next time you have an engine built/rebuilt for you, make sure you have the builder factor in the amount of block distortion with head on when honing, boring and fitting pistons. Not done nearly as often as it should be.
And next time you have an engine built/rebuilt for you, make sure you have the builder factor in the amount of block distortion with head on when honing, boring and fitting pistons. Not done nearly as often as it should be.
[url=http://www.tamon.org/?page=owners&id=10][img]http://www.tamon.org/forum/images/ute_specs.gif[/img][/url]
Yep.
Engine blocks lead a pretty stressful life, really. Not only are they placed under the immense stress of containing a series of rapidly occuring explosions, (and the heat and kinetic forces that go with them), there is also the stress of a pressurised cooling system, along with the rest!
To top it off, there are a series of bolts penetrating deep into the block and exerting an immense force on the metal that surrounds them in order to keep the head attached to the engine throughout the trauma of running.
The last thing most engine manufacturers could be stuffed dealing with is the block's tendency to warp or distort when this stress is placed upon it, and so they hone bores and fit pistons to the all but bare block and procede with the rest of the assembly without taking a second look.
The reality is that your beautifully circular bores have a tendancy to go a little egg-shaped when the head is fitted and tensioned. Now this isn't anywhere near as dramatic as it may sound when discussed in as many words, because just about every car out there suffers from the exact same disposition!
The underlying point is that race engines run at their limits for lap after lap using the same high-quality synthetic lubricants availiable to everyday consumers and are pulled down only to find no measureable amount of wear in pistons or their rings. Try the same experiment with a freshly assembled passenger car engine and identical operating conditions and the results will probably be a little disappointing.
Stree Machine had a brilliant article on this very topic not so long ago... Let me have a dig around and see if I can find it...
Engine blocks lead a pretty stressful life, really. Not only are they placed under the immense stress of containing a series of rapidly occuring explosions, (and the heat and kinetic forces that go with them), there is also the stress of a pressurised cooling system, along with the rest!
To top it off, there are a series of bolts penetrating deep into the block and exerting an immense force on the metal that surrounds them in order to keep the head attached to the engine throughout the trauma of running.
The last thing most engine manufacturers could be stuffed dealing with is the block's tendency to warp or distort when this stress is placed upon it, and so they hone bores and fit pistons to the all but bare block and procede with the rest of the assembly without taking a second look.
The reality is that your beautifully circular bores have a tendancy to go a little egg-shaped when the head is fitted and tensioned. Now this isn't anywhere near as dramatic as it may sound when discussed in as many words, because just about every car out there suffers from the exact same disposition!
The underlying point is that race engines run at their limits for lap after lap using the same high-quality synthetic lubricants availiable to everyday consumers and are pulled down only to find no measureable amount of wear in pistons or their rings. Try the same experiment with a freshly assembled passenger car engine and identical operating conditions and the results will probably be a little disappointing.
Stree Machine had a brilliant article on this very topic not so long ago... Let me have a dig around and see if I can find it...
[url=http://www.tamon.org/?page=owners&id=10][img]http://www.tamon.org/forum/images/ute_specs.gif[/img][/url]